Heater Hose Replacement

Step by step guide on how to replace automotive engine heater hoses, this article
pertains to most vehicles.
Difficulty Scale: 4 of 10Tools and Supplies Needed

Replacement hoses

Hose clamp tool

Engine coolant

Fluid catch basin

Socket set

Flashlight

Pliers

Exacto knife or razor blade

Protective eyewear and gloves

Begin with the engine cold, in park with the emergency brake set,
drain
the cooling system.
Step 1 - Locate the heater hoses to be replaced
and remove or relocate any obstructions.
Locate Heater Hoses

Step 2 - Some vehicles use a spring loaded hose
clamp which can be removed by using a special hose clamp removal tool, a pair of
pliers can also be used. A worm screw style of clamp will use a screw driver to
remove.
Hose Clamp Removal Tool
Step 3 - Once the tool has been installed, move
the hose clamp to gain access to the hose mounting fitting. (Note: Heater hoses
are connected to the heater core, this core is fragile so caution should be used
when removing the heater hoses to avoid breaking the core and causing a coolant
leak.)
Hose Clamp Removed
Step 4 - After the hose clamps have been loosened
and relocated down the hose, use an exacto knife or razor blade to gently slice the hose long ways along the fitting.
Exacto Knife
Step 5 - Once the heater hose has been cut,
gently lift and twist the hose to release it from the heater core fitting,
repeat this process for the remaining hose.
Heater Hose Removed